CN103499753B - Intelligent system for rapidly identifying transient fault of high-voltage direct-current power transmission system - Google Patents
Intelligent system for rapidly identifying transient fault of high-voltage direct-current power transmission system Download PDFInfo
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Abstract
The invention discloses an intelligent system for rapidly identifying a transient fault of a high-voltage direct-current power transmission system. The intelligent system for rapidly identifying the transient fault of the high-voltage direct-current power transmission system comprises a transient fault monitoring system, a project management module, an electromagnetic transient simulating calculation module, a fault feature fingerprint database and a fault analysis and identification module. According to the intelligent system for rapidly identifying the transient fault of the high-voltage direct-current power transmission system, firstly, a corresponding electromagnetic transient simulation model is built through the project management module, then, a large amount of simulating calculation is carried out on a target project through the electromagnetic transient simulating calculation module, information of a possible fault of the project is obtained, the information of the fault is processed through the feature extraction technology, and the fault feature fingerprint database is built. When an actual transient fault occurs, the transient fault monitoring system can automatically obtain related information of the transient fault, comparison is carried out between the information and the fault feature fingerprint database, and the type, the position and the reason of the transient fault can be judged. The reliable technological means is provided for rapid removal of the transient fault of the high-voltage direct-current power transmission system, the purpose of rapid recovery of power supply is achieved, the social economic loss is reduced, and the intelligent system for rapidly identifying the transient fault of the high-voltage direct-current power transmission system has good application and popularization prospect.
Description
Technical field
The present invention relates to a kind of intelligent system of quick identification transient fault of high-voltage direct-current power transmission, belong to technical field of high voltage power transmission.
Background technology
HVDC (High Voltage Direct Current) transmission system has that transmission capacity is large, circuit cost is low, loss is little, without the need to synchronous, be beneficial to the plurality of advantages such as networking, apply widely at home and abroad, especially in recent years, China is greatly developing extra-high voltage direct-current transmission technology, has played vital role for promoting energy source optimization configuration.But; although HVDC (High Voltage Direct Current) transmission system circuit is relatively simpler than AC system; but the device category of its current conversion station is various, Control protection system complex structure; cause originate more horn of plenty, fault type of system overvoltage more various; the ability of reply fault is poor; Yi Yin is apparatus insulated to be born superpotential threat and causes DC system fault or stoppage in transit, the safe operation of serious threat regional power grid.In recent years, during national DC transmission engineering is run, the one pole fault caused because of transient state process and bipolar locking had generation every year.
Because high-voltage direct current transmission capacity is large, once break down, the scope involved can be very wide, therefore, except wanting the generation of active prevention fault in operational process, also needs rapidly removing faults after fault occurs, recovery system power transmission.At present; for the investigation of transient fault of high-voltage direct-current power transmission; main dependence expert judges with knowwhy by rule of thumb; judging basis is then traditional oscillograph line voltage of monitoring and electric current and protection act information; information source is few; artificial judgment length consuming time, is difficult to the quick identification and the failure process reproduction that realize fault, instructs and discharge fault recovery power transmission fast.
Summary of the invention
In order to the speed making up the transient fault adopting artificial cognition and get rid of HVDC (High Voltage Direct Current) transmission system is very slow, cannot restore electricity at short notice, be difficult to the shortcoming meeting social life and economical production needs, the invention provides a kind of intelligent system of quick identification transient fault of high-voltage direct-current power transmission, failture evacuation speed can be improved, reduce Socie-economic loss.
The technical solution adopted in the present invention is:
The intelligent system of quick identification transient fault of high-voltage direct-current power transmission, comprises following several functional module:
Transient fault monitoring system, in order to monitor the transient fault in HVDC (High Voltage Direct Current) transmission system, and current waveform information when recording transient fault;
Project management module, in order to build the engineering project of primary equipment in HVDC (High Voltage Direct Current) transmission system, shows engineering project information, sets up the main wiring diagram of engineering project, and carry out device parameter configuration;
Electromagnetic transient simulation computing module, based on engineering project in project management module, according to primary equipment parameter and the linear quadratic control protection system information of engineering project, set up corresponding electromagnetic transient simulation model and carry out fault verification, build Control protection system equivalent electrical circuit, the superpotential of simulation calculation each electromagnetic transient simulation model under various transient fault, current waveform and corresponding protection act situation, statistics, obtains failure message;
Fault signature fingerprint base module, according to the fail result of electromagnetic transient simulation computing module, uses feature extraction algorithm to extract waveforms amplitude, steepness, wave front time information, and stored in Database fault signature fingerprint base together with protection act information;
Fault Identification and diagnostic module; described Fault Identification and diagnostic module are when HVDC (High Voltage Direct Current) transmission system generation transient fault; the line voltage that automatic extraction fault fluid parameter monitors and current waveform; the characteristic information of the current waveform of transient fault monitoring system registers; comprehensive lightning arrestor movement number of times, SER information warning and protection act information; Characteristic Contrast algorithm is used the transient fault characteristic information extracted and fault signature fingerprint base sample to be contrasted; sorted by the height of the information goodness of fit, thus the type of failure judgement, position and reason.
Aforesaid transient fault monitoring system comprises row ripple system for monitoring intrusion and arrester action current monitoring system, described row ripple system for monitoring intrusion is arranged in HVDC (High Voltage Direct Current) transmission line, in order to monitor power transmission line lightning shielding Intruding wave electric current, described arrester action current monitoring system is arranged in current conversion station, in order to monitor the arrester action current that current conversion station switching overvoltage causes.
Aforesaid row ripple system for monitoring intrusion and arrester action current monitoring system are by corresponding monitoring device, and wireless signal transmission and information observation form with memory storage.
Aforesaid wireless signal transmission is GPRS wireless network.
Aforesaid project management module and transient emulation computing module build based on ATP/EMTP or PSCAD/EMTDC, and wherein engineering project comprises converter power transformer, transverter, smoothing reactor, alternating current filter, DC filter, reactive-load compensation equipment and various types of friendship and direct current arrester primary equipment engineering project.
The invention has the beneficial effects as follows: although the failure mode that HVDC (High Voltage Direct Current) transmission system may occur is various, but be limited after all, the typical fault that the present invention may occur calculates as sample, when physical fault occurs, itself and the sample calculated are carried out intelligent search and contrast, by counter push away namely known break down type, position and reason, the quick eliminating that the present invention is transient fault of high-voltage direct-current power transmission provides reliable technological means, realize fast quick-recovery power transmission, reduce Socie-economic loss, have a good promotion prospects.
Accompanying drawing explanation
Fig. 1 is transient fault monitoring system structural representation of the present invention;
Fig. 2 is the structural representation of intelligent system of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further described.
HVDC (High Voltage Direct Current) transmission system device category is many, and major loop and Control system architecture complexity, cause the abundance of transient fault.After breaking down; traditional method relies on artificial cognition; based on the fault that straight-flow system in history has occurred and got rid of; in conjunction with the feature of this system equipment of itself and Control protection, investigation analysis is carried out in pointwise item by item, but due to dependable lack of experience; straight-flow system is numerous and jumbled; the speed often judged is very slow, extends the time cycle of Fault Identification, location, eliminating, is unfavorable for fast quick-recovery power transmission.
Given this, computer technology Intelligent Recognition fault is used to become a kind of excellent means making up artificial cognition failover technique defect.Research shows, although the failure mode that DC transmission system may occur is various, but be limited after all, thus can the typical fault that may occur be calculated as sample, when physical fault occurs, itself and the sample calculated are carried out intelligent search and contrast, by counter push away namely known break down type, position and reason.
The intelligent system of quick identification transient fault of high-voltage direct-current power transmission of the present invention mainly comprises following functions module:
Transient fault monitoring system, in order to monitor the transient fault in HVDC (High Voltage Direct Current) transmission system, and current waveform information when recording transient fault; As shown in Figure 1, transient fault monitoring system comprises row ripple system for monitoring intrusion and arrester action current monitoring system, wherein row ripple system for monitoring intrusion is arranged in HVDC (High Voltage Direct Current) transmission line, in order to monitor the Intruding wave electric current that power transmission line lightning shielding superpotential causes; Arrester action current monitoring system is arranged in current conversion station, in order to monitor the arrester action current that current conversion station switching overvoltage causes.Row ripple system for monitoring intrusion and arrester action current monitoring system are by corresponding monitoring device, wireless signal transmission and information observation form with memory storage, be one of important information source carrying out fault analysis and identification, the present invention adopts GPRS radio transmitting device to carry out data transmission.
Project management module, in order to build the engineering project of primary equipment in HVDC (High Voltage Direct Current) transmission system, shows engineering project information, sets up the main wiring diagram of engineering project, and carry out device parameter configuration, to realize additions and deletions and the parameter modification of equipment; The engineering project built comprises the primary equipment models such as converter power transformer, transverter, smoothing reactor, alternating current filter, DC filter, reactive-load compensation equipment and various types of AC and DC lightning arresters.
Electromagnetic transient simulation computing module, project management module and transient emulation computing module are based on electromagnetic transient in power system simulation calculation software buildings such as ATP/EMTP or PSCAD/EMTDC, based on the engineering project of electromagnetic transient simulation computing module in project management module, according to primary equipment parameter and the linear quadratic control protection system information of engineering project, set up corresponding electromagnetic transient simulation model and carry out fault verification, build Control protection system equivalent electrical circuit, the superpotential of simulation calculation each electromagnetic transient simulation model under the various typical transient fault that may occur, current waveform and corresponding protection act situation, statistical computation result, obtain the contingent failure message of this project project,
Fault signature fingerprint base module, according to the fail result of electromagnetic transient simulation computing module, uses feature extraction algorithm to extract waveforms amplitude, steepness, wave front time information, and stored in Database fault signature fingerprint base together with protection act information;
Fault Identification and diagnostic module, when HVDC (High Voltage Direct Current) transmission system generation transient fault, the line voltage that Fault Identification and diagnostic module monitor fault fluid parameter automatically and current waveform, Intruding wave current waveform and the lightning rod action current waveform of transient fault monitoring system registers carry out feature extraction, the lightning arrestor movement number of times that comprehensive lightning arrester on-line computing model records, the SER information warning that current conversion station background monitoring system obtains and protection act information, Characteristic Contrast algorithm is used the transient fault characteristic information extracted and fault signature fingerprint base sample to be contrasted, carry out sequence by the height of the information goodness of fit and provide most probable failure cause, thus the type of failure judgement, position and reason, above-mentioned information all by mobile GPRS wireless network transmissions in fault analysis and recognition system.
Describe the present invention with preferred embodiment above, should be appreciated that above-described embodiment does not limit the present invention in any form, all employings be equal to that replacement or the form of equivalent transformation obtain technical scheme, all drop on protection scope of the present invention.
Claims (5)
1. identify the intelligent system of transient fault of high-voltage direct-current power transmission fast, it is characterized in that, comprise following several functional module:
Transient fault monitoring system, in order to monitor the transient fault in HVDC (High Voltage Direct Current) transmission system, and current waveform information when recording transient fault;
Project management module, in order to build the engineering project of primary equipment in HVDC (High Voltage Direct Current) transmission system, shows engineering project information, sets up the main wiring diagram of engineering project, and carry out device parameter configuration;
Electromagnetic transient simulation computing module, based on engineering project in project management module, according to primary equipment parameter and the linear quadratic control protection system information of engineering project, set up corresponding electromagnetic transient simulation model and carry out fault verification, build Control protection system equivalent electrical circuit, the superpotential of simulation calculation each electromagnetic transient simulation model under various transient fault, current waveform and corresponding protection act situation, statistics, obtains failure message;
Fault signature fingerprint base module, according to the fail result of electromagnetic transient simulation computing module, uses feature extraction algorithm to extract waveforms amplitude, steepness, wave front time information, and stored in Database fault signature fingerprint base together with protection act information;
Fault Identification and diagnostic module; described Fault Identification and diagnostic module are when HVDC (High Voltage Direct Current) transmission system generation transient fault; the line voltage that automatic extraction fault fluid parameter monitors and current waveform; the characteristic information of the current waveform of transient fault monitoring system registers; comprehensive lightning arrestor movement number of times, SER information warning and protection act information; Characteristic Contrast algorithm is used the transient fault characteristic information extracted and fault signature fingerprint base sample to be contrasted; sorted by the height of the information goodness of fit, thus the type of failure judgement, position and reason.
2. the intelligent system of quick identification transient fault of high-voltage direct-current power transmission according to claim 1, it is characterized in that, described transient fault monitoring system comprises row ripple system for monitoring intrusion and arrester action current monitoring system, described row ripple system for monitoring intrusion is arranged in HVDC (High Voltage Direct Current) transmission line, in order to monitor power transmission line lightning shielding Intruding wave electric current, described arrester action current monitoring system is arranged in current conversion station, in order to monitor the arrester action current that current conversion station switching overvoltage causes.
3. the intelligent system of quick identification transient fault of high-voltage direct-current power transmission according to claim 2, it is characterized in that, described row ripple system for monitoring intrusion and arrester action current monitoring system are by corresponding monitoring device, and wireless signal transmission and information observation form with memory storage.
4. the intelligent system of quick identification transient fault of high-voltage direct-current power transmission according to claim 3, is characterized in that, described wireless signal transmission is GPRS wireless network.
5. the intelligent system of quick identification transient fault of high-voltage direct-current power transmission according to claim 1, it is characterized in that, described project management module and electromagnetic transient simulation computing module build based on ATP/EMTP or PSCAD/EMTDC, and wherein engineering project comprises converter power transformer, transverter, smoothing reactor, alternating current filter, DC filter, reactive-load compensation equipment and various types of friendship and direct current arrester primary equipment engineering project.
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| CN102510050A (en) * | 2011-11-08 | 2012-06-20 | 西安交通大学 | Pilot protection method for direct current line current abrupt change of multi-terminal direct current transmission system |
| CN102916436B (en) * | 2012-11-13 | 2015-07-08 | 浙江省电力公司电力科学研究院 | Transient analysis method and system of high-voltage direct-current transmission |
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